@BeExcellent &
@RangerMIke bring up some great points...BUT I dont think they're applicable here, for this particular girl. This isn't about sex, it's about
her establishing
the frame and you chasing your tail trying to figure out how you can qualify to her frame.
Promiscuous or no (and my experience with this type--and I have a lot--tells me she is/was probably more promiscuous than you or her best friend are privy to), is neither here nor there. She isn't in the game for sex, except with guys where that is all they offer--to reinforce one side of her insecurity (that she isn't worthy of commitment, but that's a secondary goal). Her primary goal is to quell the other side of those same insecurities--that she
can get other people to see her as being worthy of commitment. You care, so you're not a good fit for the secondary goal, and it's secondary anyway.
BUT you are a great source for alleviating her low sense of self worth. If women, generally speaking, value commitment/investment; and men, generally, value sex--then you have given away what she wants (even though she has no plans or capability to reciprocate that commitment--see how she deflects your efforts to commit) and
all she has to do in dangle the possibility of sex without ever having to follow through. The fact that you have a reputation as a player only makes your offer more valuable to her--and she gets to spin the angle that 'she's different from other girls and so high value that she didn't give in to your charms even though you were desperate to lay yourself at her alter.'
Win win for her. Double bind for you. Feels great, don't it? How many more hoops are you willing to jump through? She only stands to lose value from the situation by A.) Sleeping with you or B.) Committing to you.
I know this sounds harsh--and your natural instinct will be to defend your frame, defend your investment, accuse me of psychoanalyzing someone over the internet based on incomplete information, etc. But I've been involved with this type enough and you've written enough that I would bet my life on my take of the situation. And I've had the opportunity of observing these types throughout the years to see how it goes.
Here's your play: and it's not what you want to hear, since, again, you're in a double bind and you won't be able to win the outcome you desire with this girl. You double down on the fact you're a fvckboy, you don't see her as worthy as commitment, and wait til she gets into an exclusive relationship with someone far more gullible & pliable than you. Good chance she comes around for sex. Or you try to become the gullible, spineless simp that she feels safe being 'exclusive' with & she'll find some other guy who fits the fvckboy profile. Remember, she has both sides of her insecurity she needs to address. But even then, you probably won't be convincing enough for Route 2. She's too sharp for that and you'll just lower your value in your own eyes and have to deal with the fallout from that.
Insecurity's a b1tch. I avoid it, as far as emotional investment, at all costs; though if I get that text--usually 3-6 months into whatever relationship these types get into, like clockwork--well, depending on how much I want her physically, I'll do what needs doing. But that pull you feel right now, that desperation you feel (your ego btw--you have your own set of insecurities you're trying to address), high self-esteem women don't make you feel that. Reread
@BeExcellent's post. Note the type of proof & respect she sought from her man; compare it to this current girl. Different games for different outcomes--one is demanding or expecting due compensation for something of real value (from a place of self-respect); the other is extracting inflated compensation for false value (from a lack of self-respect).